<template>
  <div id="cesiumContainer">
  </div>
</template>

<script>


  export default {
    name: 'GroundPrimitive',
    mounted() {
      let viewer = this.initCesium();

      this.addGroundPrimitive(viewer)
    },
    methods: {
      initCesium: function () {
        Cesium.Ion.defaultAccessToken = 'eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJqdGkiOiJkZjg4ZjljZC1mZGM3LTRlZjEtYjg3MC00MjZkNGU3YjI5ZWUiLCJpZCI6MTU5NTIsImlhdCI6MTYwNTE0ODM5OX0.LjxeKrgAo7Ksk8405kSAhYwF0nKcF2w2DGJnKHh51N8';
        let viewer = new Cesium.Viewer('cesiumContainer', {
          animation: false,
          baseLayerPicker: false,
          fullscreenButton: false,
          geocoder: false,
          homeButton: false,
          infoBox: true,
          sceneModePicker: false,
          navigationHelpButton: false,
          scene3DOnly: true,
          timeline: false,
          selectionIndicator: false,//是否显示选取指示器组件
          shouldAnimate: false,     //自动播放动画控件
          shadows: true,//是否显示光照投射的阴影
          terrainShadows: Cesium.ShadowMode.RECEIVE_ONLY,//地质接收阴影
          sceneMode: Cesium.SceneMode.SCENE3D,
          clock: new Cesium.Clock(),
          terrainProvider: new Cesium.EllipsoidTerrainProvider()
        });
        viewer._cesiumWidget._creditContainer.style.display = "none";  //	去除版权信息
        return viewer;
      },
      addGroundPrimitive(viewer) {

        let rectangleInstance = new Cesium.GeometryInstance({
          geometry : new Cesium.RectangleGeometry({
            rectangle : Cesium.Rectangle.fromDegrees(-140.0, 30.0, -100.0, 40.0)
          }),
          id : 'rectangle',
          attributes : {
            color : new Cesium.ColorGeometryInstanceAttribute(1.0, 0.0, 0.0, 0.5)
          }
        });

        let color = new Cesium.ColorGeometryInstanceAttribute(0.0, 1.0, 1.0, 0.5); // Both instances must have the same color.

        let ellipseInstance = new Cesium.GeometryInstance({
          geometry : new Cesium.EllipseGeometry({
            center : Cesium.Cartesian3.fromDegrees(-115.0, 50.0),
            semiMinorAxis : 300000.0,
            semiMajorAxis : 400000.0
          }),
          id : 'ellipse',
          attributes : {
            color : color
          }
        })

        let groundPrimitive = new Cesium.GroundPrimitive({
          geometryInstances : [rectangleInstance,ellipseInstance]
        });
        viewer.scene.primitives.add(groundPrimitive);

        viewer.camera.flyTo({
          destination: Cesium.Cartesian3.fromDegrees(-115.0, 50.0,1000),
          orientation: {//设置相机的Heading，Pitch，Roll
            heading: Cesium.Math.toRadians(90.0),
            pitch: Cesium.Math.toRadians(-20),
            roll: 0.0
          },
          duration: 3
        })
      }
    }
  }
</script>


